The fact that the US keeps granting itself powers to act as a totalitarian state certainly doesn't make me feel better about it. The trend will likely be to keep toeing the line, using expanded surveillance and intel gathering to the furthest extent that the current law will allow. And once a decade or so, there'll be some event that allows a significant expansion with no questions asked. A blank check, if you will.
The bigger concern is the capitalist version of Big Brother, which will come much quicker. I think James Cameron saw it clearer than Orwell. The government is [marginally] constrained by the constitution. The fine folks at Macy's aren't. And unlike the government, which Americans inherently distrust, nobody will have any problem at all with their local stores and shops knowing everything they can about them.
Personally, I'd say a combination of Minority Report and Idiocracy will come much sooner than 1984. My guess is that The Man will just piggy-back off of that front. When you can usurp the right to every bit of data that we voluntarily throw around to Apple and ACS, there's no reason to start generating your own.